Tboliey-habp



1. M. JOHNSTON.

TROLLEY HARP.

APPLICATION FILED JAN. 14, law.

Patented June 10-, 1919.

2 SHEETS-SHEET l wit #4120300 J. M. JOHNSTON.

TROLLEY HARP.

APRLICATION FILED mum}. 19x9.

1 306 6 6 9 Patented June 10, 1919.

2 SHEETS-SHEET 2.

Snow wot if M 170k nsion Q g a wg JOHN M. JOHNSTON, OF SALEM, OHIO.

TROLLEY-HARP.

Specification of Letters Patent.

Patented dune Elli), 1919.

Apppl'ication filed January 14, 1919. Serial NOJQZLO EY.

To all whom it may concern:

Be it known that LJ'onn M. JOHNSTON, a citizen of the United States, residing at Salem, in the county of Columbiana and State of Ohio, have invented new and useful Improvements in Trolley-Harps, of which the following is a spec fication.

Thisinvention has reference to a novel construction of trolley harp and the principal object of the invention is to hingedly connect the wheel carrying part of the harp to the other part so as to permit the trolley to round curves readily without danger of the wheel leaving the wire.

Another object of the invention is to rc vide spring means for holding the wieel carrying part of the harp in normal posi tion or in a position to properly engage the straight parts of the trolley wire.

The invention also consists incertain other features of construction and in' the combination and arrangement of the several parts to be hereinafter fully described, illus trated in the accompanying drawings and specifically pointed out in the appended claims.

In describing my invention in detail, reference will be had to the v accompanying drawings wherein like characters denote like or corresponding parts throughout the several views, and in which Figure-1 is a plan view of the invention.

Fig. 2 is a longitudinal section.

Fig. 3 is a transversed section on line 3--3 of Fig. 1.

Fig. 4 is a view of the sliding member of the harp.

In these views, 1 indicates the harp which consists of the forked member, composed of the stationary part 2 and the sliding part 3, and the arms 4, said arms being hinged to the forked member. The stem 5 of the forked member curves downwardly and is provided with a socket to receive the trolley pole. The end of the stem is provided with the L shaped slots 6 which receive lugs on the pole so as to provide a bayonet joint between these parts. As before stated the forked member is composed of the stationary part 2 and the sliding part 3 and to make a proper connection between these parts the stationary member 2 is cut away on a line extending through the longitudinal center of the stem to a point adjacent the junction of the stem with the 'member, where the cut is passed through the side of the stem at right angles. The part 3 is provided with a lat 'lacc T which engages this face formed by the cut away portion and the lcngth of the part carrying said face 7 is less than the lcngth ol" the cut away part so that the member 3 may have sliding movement on the mcmber 2-, the cut away part forming a shoulder 8 on the stem which acts as a stop for the end of the part 3 to limit the rearward, movement of the said part 3. it will thus be sccn that the forked member is dividcd on its longitudinal center to provide the parts 2 and 3, each part carrying one of the legs of the fork. The parts are connected togethcr by providing the part 3 with a dove tail groove i) and forming a dove tail key 10 on the part 2 to en gage with said groove.

The arms 4 are hinged to the cnds of the legs of. the fork by the pins 11, said ends having recesses 12 andthe arms the projections 13 fitting in said recesses and being engaged by the pins. The meeting ends of the legs and arms are rounded as shown in Fig. 1 so that said arms may readily swing on the legs.

The arms are held in normal position by means of the spring plates l-l, which have their inner ends cngaging the straps 15 seoured to the inner 'laccs oi the legs of the forkand the outer ends provided with the hooks 16 to engage the roundcd outer ends of the arms. The outer ends of the spring plates are enlarged and are provided with the slots or openings 17 to pcrmit the palesage of the axle 18 of the wheel 1!). The ends of this axle are swiveled in openings 20 in the arms. I prefer to secure the wheel 19 to the axle by means oi the sct screw 21.

The dove tail commotion between the members 2 and 8 may be supplicd with lubricant through the openings 22:3 indicates the eye bolt carried by the harp for receiving the rope.

It will thus be seen that the arms carrying the wheel will swing to one side or the other when the car is passing around the curve thereby lessening the danger oil the wheel jumping oil the wire. As this "winging takes place the member 3 will shilc on the member 2 to keep the arms n parallel positions.

It is thought from the foregoing description that the advantages and novel lcaturps i of may invention will be readily apparent. I esire it to be understood that I .may

nmke changes in the e-; n.-it:'n1.'tion and in the em'nhimitimi and :H'I'zlftgfillibiii' oi the sefi e 'ai parts, provided than, sneh r'in-mges 't'eii. Witi'iin the swipe of the n' ipended ehiinis,

It t'iitifil as; my invention 4 1.. A tieiiey harp (:OIUPV]SiY1{ a, fork menibe!) consisting of a stationary but and a sliding pert, arms hinged to said forked member and supporting the wheel and spring; means for hoiding" the nuns in normzii position E i trolley hur emnpifisinp; fork; meniher i'foi'isisting o? it si'ntimnny punt endit sliding: part, arms hingei l to the) ends of the 1 ,aoseeo ontev ends engaging the outer ends of the anus and a trolley wheel having its :iXle join-21s.} in the outer ends of said arms.

i"..i()ii0 f harp comprising a fork meniher eonsisting of a stationary part and n siiding pant a dove tail connection between said parts arms 'hi-nged to the ends of the ie 's of the fork, spring plates hzwing their inner ends connected with said legs and thee:- onter ends hooked and engaging the outer ends of the arms and the trolley wheel having its axie engaging said arms.

In testimony whereof I have allixed. my signature.

JOHN M. Jminnrox. 

